Sound receiver and concentrator



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'c. MARGUGLJO SOUND RECEIVER AND GON CENTRATQR Filed March 6. 1923-- Patented Apr. 22, 1924.

UNITED STATES P CHRISTOPHER MARGUGLIO, OF NEW YORK, N. Y.

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Application flied March 6, 1923. Serial no, 623,245.

To all whom it may concern:

Be it known that I, CHRISTOPHER Maxie-U- cmo, a native of Italy, having declared my intention of becoming acitizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Sound Receivers and Concentrators, of which the following is a specification suflicient to enable those skilled in the art to which the invention appertains to utilize the same. 1

While the essential features of my invention are applicable to sound receiving and concentratin devices. generally, the are especially a aptable for embodiment in the mouth pieces, so called, for telephone trans mitters, phonographic recording devices, and for analogous uses where it is desirable to focus sound waves for impingement against a vibratory diaphragm, or fortrans mission through tubing, etc., for the purpose of propagating equivalent sound vibrations elsewhere.

My improvements are the result of experimental investigation undertaken for the express purpose of attaining intensification and clearness of sound transmission in a simple but effective manner, so that even relatively low tonesmay be reproduced and heard with distinctnr-ss; and the invention consists in the specific construction and con figuration of the internal surfaces of the sound receiver or mouth piece, whereby sound waves are concentrated within a common central focal area by means of a plurality of concave truncated conoidal reactive zone surfaces of different degrees of obtuse inclination as related to each other, and of acute inclination as related to a vcommoncentral longitudinal axis, as hereinafter fully set forth.

In the accom anying drawings I exemplify a practica embodiment of the essential features of my invention in a mouth piece adaptedfor use in connection with a telephone transmitter or e uivalent sound concentratin device, with t e proviso that -I do not limit myself to the identical form or construction shown, since modifications in minor details, and equivalent mechanical expedientsmay be resorted to without departing, from the spirit and intent of my invention in this respect. said invention appertaining to the concave configuration of the month piece rather than to the external shape thereof.

With this understandingz--- Fig. 1, represents an'elevation of the receiving end of the mouth piece, showing the reflective zones;

Fig. 2, a central longitudinal section taken upon ,plane of line 22, Fig. 1; and

Fig. 3, a diagram of the internal superficial configuration, and indicating the lines of incidence and reflection, etc.; a

Fig. 4, is a diagrammatic representation of modification of internal receiving and concentrating surface embodying four conjoined reflective zones.

For simplicity and convenience of illustration, I show, in the first three figures of the drawings, a n'ionth piece for a telephone transmitter or the like, made in accordance with my invention, and formed with two conjunctive concave reflective zones only, al though a greater plural number of such con junct-ive reflective zones may be embodied in a sound receiving and transmitting device of this character, as indicated diagrammatically in Fig. 4, according to preference or requirements of special use, the principlebeing the same in either case.

The mouth piece A, may be made of an suitable or desired material, such as vucanized rubber or equivalent, as may be found expedient, the preference being given to a material which will afford a smooth, polished internal surface.

ATENT OFFICE.

In this connection it may be stated that in accordance with my invention the plurality of rellecti mi zones embodied in a device of this character must necessarily be conjunctive in arrangement and. extension, with no intervening surface or space between, and the angles of conjunction must be obtuse, whereas, the superficial angles of the truncated concave reflective zones must be acuteas related to the common central axis A.

Thus, in the first three figures of the drawings, the reflective surface of primary zone 2, forms a more acute angle with relation to the central axis A, than the reflective surface of the secondary zone 2 both zones however, mergin into each other at an 0btuse angle, and the same rule applies to the successive reflective zones 2?. 2", indicated in Fig. 4.

In either case the inclinations of the reflective surfaces of the zones are formulated with relation to the annular focal area (1-(6, through which the concentrated sound vibrations are to pass, as indicated by the dotted oblique lines shown in Figs. 3 and 4, of the drawings, whereas, the parallel dotted lines shown in said figures indicate the lines of direct impetus, as well as the method of prescribing the. internal superticial configuration of a sound receiver and concentrator when made in accordance with my invention and formula.

By this method of pres ribing the relic tive angles and inclinations of my plural reflective zones as related to the diameter of the area of a circular local transmission. opening c.---u. I am enabled to eliminate ray interference, and to intensify sound transfer or reproduction. in other words, I utilize the fact that the angles of ray incidence and retlection are equal, and thcrefore prescribe the inclination of my reflective zone surfaces in such manner as to in sure c mcentration within the focal circle.

A mouthpiece constructed in accordance with my method of supplemental reflectant zone surfaces is especially adapted to long distance transmission, and to intensifying and rendering audible low tone vibrations.

What I claim as my invention and desire to secure by Letters Patent is,

1. A sound receiving and transmitting device of the character designated, formed with a plurality of conjunctive convergent concave truncated conoidal reflective "zone surfaces of differentdegrees of obtuse inclinat-ion as related to each other, and of acute inclination as related to a common central longitudinal axis, whereby sound waves impinging against said reflective surfaces will be concentrated within a prescribed f0- cal area, substantially in the manner and for the purpose described.

2. A sound receiving and transmitting device of the character designated, formed with a primary truncated conoidal concave reflective zone surface and a conjunctive secondary truncated conoidal concave reflective zone su face, both convergent at ditl'erent obtuse angles as related to each other, and at obtuse angles as related to connnon ccntral longitudinal axis, whereby sound waves impinging against said primary and secondary reflective surfaces will be concentrated within a common central focal area. substantially in the manner and for the purpose set forth.

CHRISTOPHER MARGUGLIO.

Witnesses GEO. VVM. Mm'r'r, MARGARET K. 'HANSTEIN. 

